Module: Yapper::Document::Relation::ClassMethods

Defined in:
lib/yapper/document/relation.rb

Instance Method Summary collapse

Instance Method Details

#belongs_to(relation, options = {}) ⇒ Object 



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# File 'lib/yapper/document/relation.rb', line 74

def belongs_to(relation, options={})
  fk_field = "#{relation}_id".to_sym
  self.relations[:belongs_to] << { relation => options } unless self.relations[:belongs_to].find { |r,o| r == relation }
  self.field(fk_field, :type => String)
  self.index(fk_field)

  define_method(relation) do
    instance_variable_get("@#{relation}") || Object.qualified_const_get(relation.to_s.camelize).find(self.send("#{relation}_id"))
  end

  define_method("#{relation}=") do |parent|
    self.instance_variable_set("@#{relation}", parent)
    self.send("#{relation}_id=", parent.id)
  end
end

#has_many(relation, options = {}) ⇒ Object 



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# File 'lib/yapper/document/relation.rb', line 16

def has_many(relation, options={})
  self.relations[:has_many] << { relation => options } unless self.relations[:has_many].find { |r,o| r == relation }

  define_method(relation) do
    Object.qualified_const_get(relation.to_s.singularize.camelize).where("#{self._type.underscore}_id".to_sym => self.id)
  end

  define_method("#{relation}=") do |docs|
    raise "You must pass an array of objects or attributes" unless docs.is_a?(Array)
    raise "All elements in the array must be of the same type" unless docs.all? { |doc| doc.is_a?(docs.first.class) }

    changes = {}
    db.execute do |txn|
      docs.each do |doc|
        if doc.is_a?(Yapper::Document)
          if doc.persisted?
            doc.assign_attributes("#{self._type.underscore}" => self)

            if options[:embedded]
              changes["#{relation.singularize}_ids"] ||= []
              changes["#{relation.singularize}_ids"] << doc.id
            end

            @queued_saves << [doc, options]
          else
            doc.assign_attributes("#{self._type.underscore}" => self)

            if options[:embedded]
              changes[relation] ||= []
              changes[relation] << doc.attributes
            end

            @queued_saves << [doc, options]
          end
        elsif doc.is_a?(Hash)
          doc = doc.with_indifferent_access

          klass = Object.qualified_const_get(relation.singularize.to_s.camelize)
          instance = klass.find(doc[:id]) if doc[:id]
          instance ||= klass.new
          instance.assign_attributes("#{self._type.underscore}" => self)
          instance.assign_attributes(doc)

          if options[:embedded]
            changes[relation] ||= []
            changes[relation] << instance.attributes
          end

          @queued_saves << [instance, options]
        else
          raise "Must pass either attributes or an object"
        end
      end
    end
    @changes.merge!(changes)
  end
end